×

Polarimeter

  • US 3,157,727 A
  • Filed: 03/13/1961
  • Issued: 11/17/1964
  • Est. Priority Date: 03/13/1961
  • Status: Expired due to Term
First Claim
Patent Images

1. IN A POLARIMETER WHICH INCLUDES A LIGHT SOURCE, MEANS FOR POLARIZING THE LIGHT FROM SAID SOURCE, AND AN ANALYZER HAVING AN AXIS OF POLARIZATION, THE IMPROVEMENT THAT COMPRISES MEANS FOR ACCURATELY DETERMINING A RELATIVE POSITION FOR SAID ANALYZER AXIS AND THE AVERAGE VALUE OF THE DIRECTION OF THE PLANE OF POLARIZATION OF LIGHT INCIDENT THEREON SO THAT SAID AXIS AND THE AVERAGE VALUE OF SAID DIRECTION ARE AT RIGHT ANGLES COMPRISING, IN COMBINATION, ELECTROMECHANICAL MEANS FOR CAUSING PERIODIC RELATIVE ROTARY MOVEMENT BETWEEN THE DIRECTION OF THE PLANE OF POLARIZATION OF LIGHT INCIDENT ON SAID ANALYZER AND THE AXIS OF POLARIZATION OF SAID ANALYZER, PHOTOELECTRIC MEANS FOR GENERATING A FIRST ELECTRICAL SIGNAL, SAID PHOTOELECTRIC MEANS BEING LOCATED SUCH THAT SAID PHOTOELECTRIC MEANS ARE RESPONSIVE TO THE OSCILLATING POLARIZED LIGHT PASSED BY SAID ANALYZER, MEANS PROVIDING A SECOND PERIODICALLY VARYING ELECTRICAL SIGNAL WHOSE VARIATIONS ARE SYNCHRONIZED IN FREQUENCY WITH SAID ELECTROMECHANICAL MEANS, MEANS FOR MEASURING THE AMPLITUDE AND RELATIVE PHASE OF AN ELECTRICAL SIGNAL SUPPLIED THERETO, MEANS APPLYING SAID FIRST AND SECOND SIGNALS TO SAID MEASURING MEANS WHEREBY THE AMPLITUDE AND RELATIVE PHASE OF THE FIRST HARMONIC CONTENT OF SAID FIRST ELECTRICAL SIGNAL MAY BE MEASURED AND SAID ANALYZER POSITIONED SUCH THAT SAID FIRST HARMONIC SIGNAL IS A MINIMUM.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×